/Engine/Source/Developer/IoStoreUtilities/Public/ZenStoreWriter.h
Write separate files written by UObjects during cooking viaUObject::CookAdditionalFiles.
virtual void WriteAdditionalFile ( const [FAdditionalFileInfo](API\Runtime\Core\Serialization\IPackageWriter\FAdditionalFileInfo) & Info, const [FIoBuffer](API\Runtime\Core\IO\FIoBuffer) & FileData )